I gave birth to my first in 2002 and my last in 2019. Having had a front line view of both parenting and childhood illness for over 20 years, I cannot agree with this statement enough.
This. is. not. normal.
To anyone who gave birth to a child around 2020, it is NOT normal for your kid to be sick all the time. I am 50 years old and have had the flu maybe 5 times in my entire life.
Clean the air. Wear a mask. Save your kids.